Side by side

Seiko Astron GPS Solar 2026 Limited EditionvsYema Superman Slim CMM.20

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Astron GPS Solar 2026 Limited Edition
SeikoAstron GPS Solar 2026 Limited Edition
MSRP $2,400
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

14 of 29 specs differ
Diameter
Astron GPS Solar 2026 Limited Edition41.2mm
Superman Slim CMM.2039mm
Power Reserve
Astron GPS Solar 2026 Limited Edition40h
Superman Slim CMM.2040h
Water Resistance
Astron GPS Solar 2026 Limited Edition100m
Superman Slim CMM.20300m
MSRP
Astron GPS Solar 2026 Limited Edition$2,400
Superman Slim CMM.20$2,372

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
41.2mm
39mm
Thickness
12mm
9.95mm
Lug-to-Lug
48.6mm
Lug Width
14mm
20mm
Material
Titanium
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Super-clear coating
Inner
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
3X62
Yema CMM.20
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,400
$2,372

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Astron GPS Solar 2026 Limited Edition

The Seiko Astron GPS Solar 2026 Limited Edition is noted for its advanced GPS timekeeping that automatically updates time and date via satellite signals, powered by light to eliminate battery changes. Owners appreciate its design and texture, and the legible dial despite its complexity, with one owner preferring its less overloaded appearance over other Astron models. However, the GPS function requires a clear outdoor line-of-sight to the sky for reception, which can be an issue indoors or in dense urban environments, and DST is not implemented. The watch is priced over $2,000, and while it features a perpetual calendar, it only displays the date. Overall, owners and reviewers find the Seiko Astron GPS Solar 2026 Limited Edition a functional and appealing watch, particularly for its automatic timekeeping and solar power, though its GPS reception limitations and price point are noted considerations.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

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